Convert Power Units Online - Watts, HP & More
Power Converter
Easily convert between Watts (W), Kilowatts (kW), Megawatts (MW), and Horsepower (hp). Whether you're working with engines, electrical systems, or home appliances, this tool helps you get fast and accurate power conversions.
Why Use It?
- Ideal for electrical engineering, automotive applications, HVAC, and energy audits.
- Converts between metric (SI) and imperial power units.
- Accurate to four decimal places.
- Perfect for students, engineers, technicians, and energy professionals.
Popular Conversions
- Watts to Horsepower
- Horsepower to Watts
- Kilowatts to Watts
- Watts to Kilowatts
- Kilowatts to Horsepower
- Megawatts to Kilowatts
Common Power Units and Their Uses
Watts (W)
SI unit of power. Used in devices.
Kilowatts (kW)
1,000 W. Appliances, solar, generators.
Megawatts (MW)
1,000,000 W. Power plants, industry.
Horsepower (hp)
Engines and motors (multiple defs).
Real-World Use Cases for Power Conversion
Automotive
Compare car engine ratings in hp and kW.
Renewable energy
Convert solar panel or generator outputs.
Appliances
Evaluate power consumption of home devices.
HVAC systems
Calculate heating and cooling requirements.
Industrial
Interpret load and energy production in large systems.
Frequently Asked Questions
How many watts are in one horsepower?
One mechanical horsepower is approximately 745.7 watts
What's the difference between kW and kWh?
kW (kilowatt) is a measure of power (rate of energy use), while kWh (kilowatt-hour) is a measure of energy consumed over time.
Why do some devices use horsepower instead of watts?
Horsepower is traditionally used for engines and motors because it was historically developed to quantify work done by machines like steam engines and cars, especially in the imperial system.
Can I use kilowatts and horsepower interchangeably?
They measure the same physical quantity (power), but their numerical values differ. 1 kW = 1.341 hp (mechanical), so a conversion is needed.